Ethyl p-chlorobenzalpyruvate → Ethyl 4-(4-chlorophenyl)-2-oxobutanoate
Reaktionsgleichung
[Cl:1][C:2]1[CH:16]=[CH:15][C:5]([CH:6]=[CH:7][C:8](=[O:14])[C:9]([O:11][CH2:12][CH3:13])=[O:10])=[CH:4][CH:3]=1>[PdH2]>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([CH2:6][CH2:7][C:8](=[O:14])[C:9]([O:11][CH2:12][CH3:13])=[O:10])=[CH:15][CH:16]=1Komponenten
3
Edukt 1
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
To the ethyl p-chlorobenzalpyruvate from step B (23.6 g, 0.1 moL) was added 0.1 g of the palladium catalyst from Example 1. The reactor was pressurized to 10 psi with H2 for two hours after which time the catalyst was removed by filtration and the ethyl 4-(p-chlorophenyl)-2-ketobutanoate isolated by vacuum concentration in quantitative yield. 3H NMR (CDCl3) δ: 1.1 (t, 3H), 3.8 (m, 4H), 4.0 (q, 2H), 7.1 (s, 4H), IR (film) cm-1 : 3450w, 3075-2875s, 1750s, 1710s, 1600m, 675s.
Aufarbeitung
- customafter which time the catalyst was removed by filtration